Q.

The ‘Green House effect' is produced due to the presence of excess amount of –

A. Sulphur dioxide
B. Nitrogen dioxide
C. Carbon monoxide
D. Methane
Answer» D. Methane
Explanation: By their percentage contribution to the greenhouse effect on Earth the four major gases are: Water vapour (36-70%), Carbon dioxide (9-26%), Methane (4-9%) and Ozone (3- 7%).
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